"""Application composition root."""

from __future__ import annotations

import tkinter as tk

from .color_picker import ColorPickerMixin
from .constants import DEFAULTS
from .exclusions import ExclusionMixin
from .image_processing import ImageProcessingMixin
from .reset import ResetMixin
from .theme import ThemeMixin
from .ui import UIBuilderMixin


class PurpleTunerApp(
    ThemeMixin,
    UIBuilderMixin,
    ImageProcessingMixin,
    ExclusionMixin,
    ColorPickerMixin,
    ResetMixin,
):
    """Tkinter based application for highlighting purple hues in images."""

    def __init__(self, root: tk.Tk):
        self.root = root
        self.root.title("Purple Tuner — Bild + Overlay")
        try:
            self.root.state("zoomed")
        except Exception:
            pass
        self.root.configure(bg="#f2f2f7")

        # Theme and styling
        self.init_theme()

        # Tkinter state variables
        self.DEFAULTS = DEFAULTS.copy()
        self.hue_min = tk.DoubleVar(value=self.DEFAULTS["hue_min"])
        self.hue_max = tk.DoubleVar(value=self.DEFAULTS["hue_max"])
        self.sat_min = tk.DoubleVar(value=self.DEFAULTS["sat_min"])
        self.val_min = tk.DoubleVar(value=self.DEFAULTS["val_min"])
        self.val_max = tk.DoubleVar(value=self.DEFAULTS["val_max"])
        self.alpha = tk.IntVar(value=self.DEFAULTS["alpha"])
        self.ref_hue = None

        # Debounce for heavy preview updates
        self.update_delay_ms = 400
        self._update_job = None

        # Exclusion rectangles (preview coordinates)
        self.exclude_rects: list[tuple[int, int, int, int]] = []
        self._rubber_start = None
        self._rubber_id = None
        self.pick_mode = False

        # Image references
        self.image_path = None
        self.orig_img = None
        self.preview_img = None
        self.preview_tk = None
        self.overlay_tk = None

        # Build UI
        self.setup_ui()
        self._init_copy_menu()
        self.bring_to_front()


def start_app() -> None:
    """Entry point used by the CLI script."""
    root = tk.Tk()
    app = PurpleTunerApp(root)
    root.mainloop()


__all__ = ["PurpleTunerApp", "start_app"]